Like Edmonton Canada; City, County and State Police Departments can agree and show statistically that the use of Driver Feedback Displays ultimately reduces the frequency of speeding motorists.
Drivers have an inherent reaction to seeing a flashing display of their speed. That reaction being, an immediate response to apply the brake.
Why? Focus Groups explain that a real or perceived threat exists after drivers realize that a sign they’re approaching is now flashing as a result of their action.
Who’s watching? Am I being photographed? Is this recorded? Is there law enforcement ahead? Am I getting a ticket? All of these reactions and thoughts, leading up to the braking response occur instantly, and are often associated with Traffic Calming.